diff --git a/inference/models/owlv2/owlv2.py b/inference/models/owlv2/owlv2.py
index 407d109d99..e15db0cd8b 100644
--- a/inference/models/owlv2/owlv2.py
+++ b/inference/models/owlv2/owlv2.py
@@ -359,14 +359,14 @@ def image_hash(self) -> Hash:
 
 def hash_wrapped_training_data(wrapped_training_data: List[Dict[str, Any]]) -> Hash:
     just_hash_relevant_data = [
-        [
+        (
             d["image"].image_hash,
             d["boxes"],
-        ]
+        )
         for d in wrapped_training_data
     ]
     # we dump to pickle to serialize the data as a single object
-    return hash_function(pickle.dumps(just_hash_relevant_data))
+    return hash_function(pickle.dumps(just_hash_relevant_data, protocol=4))
 
 
 class OwlV2(RoboflowInferenceModel):